233131328 has 14 divisors (see below), whose sum is σ = 462620106. Its totient is φ = 116565632.

The previous prime is 233131321. The next prime is 233131343. The reversal of 233131328 is 823131332.

It can be written as a sum of positive squares in only one way, i.e., 146119744 + 87011584 = 12088^2 + 9328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 233131297 and 233131306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821275 + ... + 1821402.

Almost surely, 2^233131328 is an apocalyptic number.

It is an amenable number.

233131328 is a deficient number, since it is larger than the sum of its proper divisors (229488778).

233131328 is an equidigital number, since it uses as much as digits as its factorization.

233131328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642689 (or 3642679 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 233131328 is about 15268.6387081495. The cubic root of 233131328 is about 615.4605385557.

The spelling of 233131328 in words is "two hundred thirty-three million, one hundred thirty-one thousand, three hundred twenty-eight".